Statistics for occurrence #1 of “Hagerstown, Md.” in alphabetic letter H, entry group 3, entry harper-s-ferry of Harper's Encyclopedia of United States History:

... Hagerstown, Md.
A town in Jefferson county, W. Va.; 49 miles northwest of Washington; at the junction of the Shenandoah and Potomac rivers;...
Max. Freq. Min. Freq.
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† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.